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1. 发明授权

US4887853A Method and apparatus for providing a unitary assembly of tubing and a terminating fitting 失效
标题翻译：用于提供管道和端接接头的单一组件的方法和装置
公开(公告)号：US4887853A
公开(公告)日：1989-12-19
申请号：US90864
申请日：1987-08-28
申请人： Charles V. Flowers , Bernard J. Sass
发明人： Charles V. Flowers , Bernard J. Sass
IPC分类号： B23K1/18 , F16L19/02
CPC分类号： F16L19/02 , B23K1/18 , Y10T29/4994
摘要： A unitary assembly of tubing and an end fitting. The end fitting comprises a threaded fastener fitting having a tubular bore extending therethrough. An undercut annular groove is coaxially provided in the wall portion of the tubular bore which is spaced apart from the end of the fitting. The opening of the tubular bore at the end of the fitting is provided with an undercut counterbore. The end of the tubing is inserted through the opening and into the tubular bore until it engages a stop formed by a reduced diameter portion of the tubular bore at the axially inward end of the undercut annular groove. A ball mandrel is inserted through the opening at the other end of the tubular bore to engage and force the end portion of the tube into the undercut annular groove. A braze ring is inserted into the undercut counterbore the latter of which allows a braze fillet to form during the brazing operation.
摘要翻译：管件和端接件的整体组件。端部配件包括具有延伸穿过其中的管状孔的螺纹紧固件配件。在管状孔的壁部同轴地设置有底切环形槽，其与配件的端部间隔开。在配件末端处的管状孔的开口设置有底切沉孔。管的端部通过开口插入管状孔中，直到其接合在底切环形槽的轴向内端处由管状孔的缩径部形成的止挡件。球轴在管孔的另一端穿过开口插入，以将管的端部接合并迫使管的端部进入底切环形槽。钎焊环被插入到底切沉孔中，后者允许在钎焊操作期间形成钎焊圆角。

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